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arXiv 1803.04747quant-ph
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量子相干性的准概率表示

Quasiprobability representation of quantum coherence

J. Sperling, I. A. Walmsley

摘要:

本文介绍了一种构造任意量子相干性概念的准概率表示的一般方法。我们的技术产生一个非负的概率分布的任何经典状态的分解。相反,量子现象是根据有符号分布来证明的,即,准概率,以及通过经典状态不可访问的剩余分量。我们的统一方法结合了成熟的概念,如量子光学中的相空间分布,与量子技术相关的量子资源。我们应用我们的方法来分析各种形式的量子相干性在不同的物理系统。此外,我们的框架使得揭示系统之间复杂的量子关联成为可能,例如,通过多体纠缠的准概率表示。

英文摘要:

We introduce a general method for the construction of quasiprobability representations for arbitrary notions of quantum coherence. Our technique yields a nonnegative probability distribution for the decomposition of any classical state. Conversely, quantum phenomena are certified in terms of signed distributions, i.e., quasiprobabilities, and a residual component unaccessible via classical states. Our unifying method combines well-established concepts, such as phase-space distributions in quantum optics, with resources of quantumness relevant for quantum technologies. We apply our approach to analyze various forms of quantum coherence in different physical systems. Moreover, our framework renders it possible to uncover complex quantum correlations between systems, for example, via quasiprobability representations of multipartite entanglement.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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